1 2 3 4
H E E E
* X C X
  * t -
    * t
      *
handedness 1 2 3 L
handedness 1 2 4 L
handedness 1 3 4 L
sheetS 2 3 4
length 1 H 8 100
length 2 E 5 100
length 3 E 5 100
length 4 E 5 100